下列疾病中哪一项是伴有肿块阴影的肺血管异常的疾病()
A.肺动静脉瘘
B.部分肺静脉回流异常
C.肺动脉缺如
D.肺动脉狭窄
E.一侧肺发育不全
参考答案:A
A mother of a 4-month-old infant asks the nurse when she should wean from breast-feeding and begin using a cup. Which of the following would be the best indication of the infant’s readiness to be weaned
A. Taking solid foods well.B. Sleeping through the night.C. Shortening the nursing time.D. Eating on a regular schedul
灭火器根据操作使用方法不同可以分为手提式灭火器和推车式灭火器。